"My administration is determined to do everything in our power to protect our students, secure our schools and do everything we can to keep weapons out of the hands of those who pose a threat to themselves and to others," Trump said during an event at the White House. "Everyone must work together at every level of government to keep our children safe."

The president also expressed his condolences to the victims at Santa Fe High School in Santa Fe Texas. Several news outlets have reported multiple fatalities, and the gunman has been arrested.

"We grieve for the terrible loss of life and send our support to everyone affected by this absolutely horrific attack," he said. "To the students, families, teachers and personnel at Santa Fe High, we are with you at this tragic hour and we will be with you forever."

According to the White House, Trump spoke with Texas Gov. Greg Abbott, pledging to work with the governor and to provide federal assistance.

Trump has previously promised his administration would work on school safety before. Following the now infamous high school shooting in Parkland, Fla., the president met with students for an emotional forum in February. There, he promised tougher background checks and mental health screens for gun buyers.

And as more people have called for gun control in recent months, the Justice Department has proposed a ban on so-called bump stocks, which allow rifles to mimic machine guns. Bump stocks were used in last year's Las Vegas shooting massacre that left 58 people dead.

On average, there has been one school shooting a week in the United States in 2018 alone, according to CNN. But Trump doesn't tweet about every incident, and it's unclear why he comments on certain situations.

School shooting in Texas. Early reports not looking good. God bless all!

In January, he tweeted about the school shooting at Marshall County High School in Benton, Ky., which left two people dead and several others injured.

Earlier today, I spoke with @GovMattBevin of Kentucky regarding yesterday’s shooting at Marshall County High School. My thoughts and prayers are with Bailey Holt, Preston Cope, their families, and all of the wounded victims who are in recovery. We are with you!